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CIRCULAR NO. 129, BUREAU OF PLANT INDUSTRY 



sary also that crop varieties suited to the conditions on the i)roject be 

 found and that cultural methods suited to local conditions be de- 

 termmed. 



Smce its establishment in 1909 the Umatilla Experiment Farm 

 (fig. 1) has been devoted to the investigation of these problems. 

 The work of the farm is mamly horticidtural and is at present con- 

 fined chiefly to testmg varieties of orchard fruits, small fruits, and truck 

 crops and to investigatmg methods of producmg these crops. All the 

 experiments are under irrigation. 



CONDITIONS ON THE PROJECT. 



CLIMATIC CONDITIONS. 



Measurements of precipitation, evaporation, wind velocity, and 

 temperature are made m cooperation with the Biophysical Laboratory 

 of the Bureau of Plant Industry. A summary of these climatological 

 observations in 1912 is given in Table I. 



Table I. — Summary of climatological observations at the Umatilla Experiment Farm 



in 1912. 



1 Evaporation for 9 months, April to December, inclusive. 



The dates of the last spring frosts and first autumn frosts from 

 1909 to 1911, inclusive, were obtained from the local office of the Rec- 

 lamation Service at Hermiston, about 2 miles from tlie experiment 

 farm. In 1912 the observations were made at the farm. These data 

 for the four years 1909 to 1912, inclusive, are given in Table II. 



Table II. — Killing frosts at or near Hermiston, Oreg., 1909 to 1912, inclusive. 



IClr. 129] 



